Move events ID gens to EventWorkerStore

3 files changed, 22 insertions, 33 deletions

diff --git a/synapse/replication/slave/storage/events.py b/synapse/replication/slave/storage/events.py
index fc04ad5fe0..1c3dd72b2d 100644
--- a/synapse/replication/slave/storage/events.py
+++ b/synapse/replication/slave/storage/events.py
@@ -58,26 +58,6 @@ class SlavedEventStore(
     BaseSlavedStore,
 ):
     def __init__(self, database: Database, db_conn, hs):
-        if hs.config.worker_app is None:
-            self._stream_id_gen = StreamIdGenerator(
-                db_conn,
-                "events",
-                "stream_ordering",
-                extra_tables=[("local_invites", "stream_id")],
-            )
-            self._backfill_id_gen = StreamIdGenerator(
-                db_conn,
-                "events",
-                "stream_ordering",
-                step=-1,
-                extra_tables=[("ex_outlier_stream", "event_stream_ordering")],
-            )
-        else:
-            self._stream_id_gen = SlavedIdTracker(db_conn, "events", "stream_ordering")
-            self._backfill_id_gen = SlavedIdTracker(
-                db_conn, "events", "stream_ordering", step=-1
-            )
-
         super(SlavedEventStore, self).__init__(database, db_conn, hs)
 
         events_max = self._stream_id_gen.get_current_token()
diff --git a/synapse/storage/data_stores/main/__init__.py b/synapse/storage/data_stores/main/__init__.py
index 5df9dce79d..fa63bad0a8 100644
--- a/synapse/storage/data_stores/main/__init__.py
+++ b/synapse/storage/data_stores/main/__init__.py
@@ -125,19 +125,6 @@ class DataStore(
         self._clock = hs.get_clock()
         self.database_engine = database.engine
 
-        self._stream_id_gen = StreamIdGenerator(
-            db_conn,
-            "events",
-            "stream_ordering",
-            extra_tables=[("local_invites", "stream_id")],
-        )
-        self._backfill_id_gen = StreamIdGenerator(
-            db_conn,
-            "events",
-            "stream_ordering",
-            step=-1,
-            extra_tables=[("ex_outlier_stream", "event_stream_ordering")],
-        )
         self._presence_id_gen = StreamIdGenerator(
             db_conn, "presence_stream", "stream_id"
         )
diff --git a/synapse/storage/data_stores/main/events_worker.py b/synapse/storage/data_stores/main/events_worker.py
index 970c31bd05..8e0f269721 100644
--- a/synapse/storage/data_stores/main/events_worker.py
+++ b/synapse/storage/data_stores/main/events_worker.py
@@ -37,8 +37,10 @@ from synapse.events import make_event_from_dict
 from synapse.events.utils import prune_event
 from synapse.logging.context import PreserveLoggingContext, current_context
 from synapse.metrics.background_process_metrics import run_as_background_process
+from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
 from synapse.storage._base import SQLBaseStore, make_in_list_sql_clause
 from synapse.storage.database import Database
+from synapse.storage.util.id_generators import StreamIdGenerator
 from synapse.types import get_domain_from_id
 from synapse.util.caches.descriptors import Cache, cached, cachedInlineCallbacks
 from synapse.util.iterutils import batch_iter
@@ -74,6 +76,26 @@ class EventsWorkerStore(SQLBaseStore):
     def __init__(self, database: Database, db_conn, hs):
         super(EventsWorkerStore, self).__init__(database, db_conn, hs)
 
+        if hs.config.worker_app is None:
+            self._stream_id_gen = StreamIdGenerator(
+                db_conn,
+                "events",
+                "stream_ordering",
+                extra_tables=[("local_invites", "stream_id")],
+            )
+            self._backfill_id_gen = StreamIdGenerator(
+                db_conn,
+                "events",
+                "stream_ordering",
+                step=-1,
+                extra_tables=[("ex_outlier_stream", "event_stream_ordering")],
+            )
+        else:
+            self._stream_id_gen = SlavedIdTracker(db_conn, "events", "stream_ordering")
+            self._backfill_id_gen = SlavedIdTracker(
+                db_conn, "events", "stream_ordering", step=-1
+            )
+
         self._get_event_cache = Cache(
             "*getEvent*",
             keylen=3,